:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#dbeafe;--color-danger:#dc2626;--color-danger-light:#fee2e2;--color-warning:#f59e0b;--color-warning-light:#fef3c7;--color-success:#16a34a;--color-success-light:#dcfce7;--color-gray-50:#f9fafb;--color-gray-100:#f3f4f6;--color-gray-200:#e5e7eb;--color-gray-300:#d1d5db;--color-gray-400:#9ca3af;--color-gray-500:#6b7280;--color-gray-600:#4b5563;--color-gray-700:#374151;--color-gray-800:#1f2937;--color-gray-900:#111827;--sidebar-width:240px;--header-height:56px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;color:var(--color-gray-800);background:var(--color-gray-50);font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:inherit;text-decoration:none}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input,select,textarea{font-family:inherit;font-size:inherit}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--color-gray-300);border-radius:3px}.app-layout{height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--color-gray-900);color:#fff;flex-direction:column;flex-shrink:0;transition:width .2s;display:flex}.sidebar-header{height:var(--header-height);border-bottom:1px solid #ffffff1a;align-items:center;padding:0 20px;display:flex}.sidebar-header h1{letter-spacing:-.5px;font-size:16px;font-weight:700}.sidebar-header span{color:var(--color-gray-400);margin-left:8px;font-size:11px}.sidebar-nav{flex:1;padding:12px 8px;overflow-y:auto}.sidebar-section-title{color:var(--color-gray-400);text-transform:uppercase;letter-spacing:.5px;padding:12px 12px 6px;font-size:11px;font-weight:600}.sidebar-link{color:var(--color-gray-300);border-radius:8px;align-items:center;gap:10px;padding:10px 12px;font-size:14px;transition:all .15s;display:flex}.sidebar-link:hover{color:#fff;background:#ffffff14}.sidebar-link.active{background:var(--color-primary);color:#fff}.sidebar-link svg{flex-shrink:0;font-size:18px}.sidebar-footer{border-top:1px solid #ffffff1a;padding:12px 8px}.sidebar-footer .user-info{align-items:center;gap:10px;padding:8px 12px;display:flex}.sidebar-footer .user-avatar{background:var(--color-primary);border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:14px;font-weight:600;display:flex}.sidebar-footer .user-name{font-size:13px;font-weight:500}.sidebar-footer .user-role{color:var(--color-gray-400);font-size:11px}.main-content{flex-direction:column;flex:1;min-width:0;display:flex}.top-header{height:var(--header-height);border-bottom:1px solid var(--color-gray-200);background:#fff;flex-shrink:0;justify-content:space-between;align-items:center;padding:0 24px;display:flex}.top-header-left{align-items:center;gap:16px;display:flex}.top-header-left h2{font-size:18px;font-weight:600}.top-header-right{align-items:center;gap:12px;display:flex}.page-content{flex:1;padding:24px;overflow-y:auto}.notification-btn{color:var(--color-gray-500);border-radius:8px;padding:8px;transition:all .15s;position:relative}.notification-btn:hover{background:var(--color-gray-100);color:var(--color-gray-700)}.notification-badge{background:var(--color-danger);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:18px;height:18px;font-size:10px;font-weight:700;display:flex;position:absolute;top:4px;right:4px}.card{border:1px solid var(--color-gray-200);background:#fff;border-radius:12px;padding:20px}.card-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.card-title{font-size:16px;font-weight:600}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px;display:grid}.stat-card{border:1px solid var(--color-gray-200);background:#fff;border-radius:12px;align-items:center;gap:16px;padding:20px;display:flex}.stat-icon{border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;font-size:22px;display:flex}.stat-icon.blue{background:var(--color-primary-light);color:var(--color-primary)}.stat-icon.green{background:var(--color-success-light);color:var(--color-success)}.stat-icon.red{background:var(--color-danger-light);color:var(--color-danger)}.stat-icon.yellow{background:var(--color-warning-light);color:var(--color-warning)}.stat-value{font-size:28px;font-weight:700;line-height:1}.stat-label{color:var(--color-gray-500);margin-top:4px;font-size:13px}.status-badge{border-radius:12px;align-items:center;gap:4px;padding:4px 10px;font-size:12px;font-weight:600;display:inline-flex}.status-badge.critical{background:var(--color-danger-light);color:var(--color-danger)}.status-badge.warning{background:var(--color-warning-light);color:#92400e}.status-badge.normal,.status-badge.online{background:var(--color-success-light);color:var(--color-success)}.status-badge.offline{background:var(--color-gray-100);color:var(--color-gray-500)}.status-badge.error,.status-badge.open{background:var(--color-danger-light);color:var(--color-danger)}.status-badge.in_progress{background:var(--color-warning-light);color:#92400e}.status-badge.resolved{background:var(--color-success-light);color:var(--color-success)}.status-dot{background:currentColor;border-radius:50%;width:6px;height:6px}.data-table{border-collapse:collapse;width:100%}.data-table th{text-align:left;color:var(--color-gray-500);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--color-gray-200);background:var(--color-gray-50);padding:12px 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var(--color-gray-300);border-radius:8px;outline:none;width:100%;padding:10px 14px;font-size:14px;transition:border-color .15s}.form-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:#fff;border-radius:16px;width:90%;max-width:520px;max-height:90vh;padding:24px;overflow-y:auto}.modal-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.modal-title{font-size:18px;font-weight:600}.modal-close{color:var(--color-gray-400);border-radius:6px;padding:4px}.modal-close:hover{background:var(--color-gray-100);color:var(--color-gray-600)}.modal-actions{justify-content:flex-end;gap:8px;margin-top:24px;display:flex}.notification-panel{top:var(--header-height);width:380px;height:calc(100vh - var(--header-height));border-left:1px solid 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100%);justify-content:center;align-items:center;height:100vh;display:flex}.login-card{background:#fff;border-radius:16px;width:100%;max-width:420px;padding:40px;box-shadow:0 20px 60px #0003}.login-logo{text-align:center;margin-bottom:32px}.login-logo h1{color:var(--color-gray-900);font-size:24px;font-weight:700}.login-logo p{color:var(--color-gray-500);margin-top:8px;font-size:14px}.login-error{background:var(--color-danger-light);color:var(--color-danger);border-radius:8px;margin-bottom:16px;padding:10px 14px;font-size:13px}.remote-btn{color:#fff;background:#7c3aed;border-radius:8px;align-items:center;gap:6px;padding:6px 14px;font-size:13px;font-weight:500;transition:background .15s;display:inline-flex}.remote-btn:hover{background:#6d28d9}@media (width<=1024px){.detail-panel{width:320px}.stats-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.sidebar{width:60px}.sidebar-link span,.sidebar-header h1,.sidebar-header span,.sidebar-section-title,.sidebar-footer .user-name,.sidebar-footer .user-role{display:none}.detail-panel{z-index:500;width:360px;height:100vh;position:fixed;top:0;right:0;box-shadow:-4px 0 20px #0000001a}}.toast-container{z-index:2000;flex-direction:column;gap:8px;display:flex;position:fixed;top:70px;right:24px}.toast{border:1px solid var(--color-gray-200);background:#fff;border-radius:10px;align-items:flex-start;gap:12px;min-width:320px;max-width:420px;padding:14px 18px;animation:.3s slideIn;display:flex;box-shadow:0 4px 16px #0000001f}.toast.leaving{animation:.3s forwards slideOut}.toast-icon{flex-shrink:0;margin-top:1px;font-size:20px}.toast-icon.critical{color:var(--color-danger)}.toast-icon.warning{color:var(--color-warning)}.toast-icon.info{color:var(--color-primary)}.toast-body{flex:1}.toast-title{font-size:14px;font-weight:600}.toast-message{color:var(--color-gray-500);margin-top:2px;font-size:13px}@keyframes slideIn{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}@keyframes slideOut{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(100%)}}.tab-bar{border-bottom:2px solid var(--color-gray-200);margin-bottom:20px;display:flex}.tab-item{color:var(--color-gray-500);border-bottom:2px solid #0000;margin-bottom:-2px;padding:10px 20px;font-size:14px;font-weight:500;transition:all .15s}.tab-item:hover{color:var(--color-gray-700)}.tab-item.active{color:var(--color-primary);border-bottom-color:var(--color-primary)}.empty-state{text-align:center;color:var(--color-gray-400);padding:60px 20px}.empty-state svg{margin-bottom:16px;font-size:48px}.empty-state p{font-size:15px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}